70series PTOs not stoping.----- Warning!!!

[Adirondack case guy]

Been watching Kow Farmers thread. The cable linkage is critical to proper performance of the PTO. As stated the first place to look! --If all is good in this area and a preasure check shows no pressure to the PTO clutch pack when lever is in OFF position and PTO is still turning, BEWARE.
If you can (carefully grab the shaft) with your hand, and stop it, your clutch plates are OK,but the brake could be worn out or broken off the brake acuation shaft, only 5/16" diamiter. In 970s and 1070s this could result in" blowing out" the bottom of the Tranny housing. 7,8 and 1170/5s have smaller bull gears, Not so much of an issue, BUT as I said 9s&10s have big bullgears that just clear the bottom of the tranny case and when the pto brake pad casting peice falls from the back of the PTO assy, it falls into the tranny housing, and Murphy will eventually push it between 0ne of the bullgears and the housing. Like stated on an earlier post about LA tranny, (broken, due to broken drive chain ) I have had to weld back the peices in far too many 9s&10s Trannys. My recomendation, if it doesn't stop "pull the rear housing and inspect the PTO assy and brake to be on the safe side"

Loren
 

[RGMartin]

[jon f mn]

This happened to my dads 970. I've mentioned it a couple a times too. Can't spread that word enough. Thanks
 

[Adirondack case guy]

Rich.
I am hoping that the wifey and I can make some overnight trips next year to meet or reaquaint ourselves with some new and old friends from Penns-a Ketucky, and a BIN in Moundsville WV. I would love to stop by and shake your hand, and spend some time, but keep your ever turning pto to yourself LOL.- I'm not bringing my SnapOn tool chest.
Loren.
 

[Kow Farmer]

Loren,
I have a neighbor across the field from me that was a Case mechanic for 40 years. I asked him about the PTO issue I am having. He said it could be a cable, but he has only seen 1 fail in the 40 years that he recalls. He thinks it is the clutches? I don't know anything about these tractors internally. I emailed Case Nutty for some info also. Any info I can get from you Case "wizards" is very much appreciated. Thank you. I really appreciate everyone's help from this forum.
Kow Farmer
Kurt
 

[1370rod]

A very good piece of advice. The brake head braking off on the 70 series in this area has not been a big problem. Much more common was the bolt falling out of the idler shaft on the 30 series and real early 70 series PTO then going under a bull gear. PTO turning complaints in this area are ussually caused by the plates being warped, worn out brake and weak brake springs and of course cable adjustment. If the PTO plates ever need replacing, use the 30 series A33012 and not the ones listed in the 1070 parts book as they are a cheaper paper style lining and not the good brass style the A33012 is. Rod.
 

[Adirondack case guy]

Kurt,
Most cable failures were on open station tractors at the trunion on the engagement lever. The trunion rusted fast and would not swivel, causing the cable core to break off. There were also ocasional issues with the large cable locating nuts loosening and allowing the cable housing to slip loose from the brackets, causing improper spool movement.
You have a late model 1070 with a bonded brake pad and a stronger brake engagement spring. Low pto clutch pressure or an opperator who engaged the pto frequently to (say unplug a chopper} would warp the clutch discs so they drag, and cause the pto to overide the brake. Also the outside if the tapered clutch drum on which the Brake shoe rides is machined about .004 off center allowing the brake shaft to ride further out, on the shy side and engage the drumb more vigorusly when it revolves to the bold side If at sometime, the clutch plates were able to overide the brake, the shaft/pad would not retract, but the drumb would flex the 5/16" brake shaft and eventually the shaft would break and then the cast brake shoe was in the bottom of the tranny. As Rich said, if the pto coasts without load and can be stopped with a very light load, as with the "iron fist" as I sugested, (You should also be able to feel the efect of the offset with the break holding in one spot a bit more, if just worn), you are probably OK, BUT heed my warning.
Loren
 

[Adirondack case guy]

Rod,
We had a few of thos issues also but at least in our "Cases" the cap screw lost.
Loren
 

[1370rod]

Loren, for us the bolt would ussually just bulge the bottom a little causing a few hair line cracks, then would leak a little oil. Thats how the owner would notice there might be a problem. Nothing a little sealer would'nt fix, lol, Rod.
 

[RGMartin]

[Kow Farmer]

Loren,
Thanks for your advice. I got some email scans from Case Nutty with really good info. The PTO shaft can't be stopped by hand. I tried to lightly "grab" it. It definitely has full torque. I am going to look at the cable first and go from there. I have a feeling it is internal though. Thank you again.
Kow Farmer (Kurt)